Subsequent Event (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands |
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6 Months Ended |
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Feb. 06, 2017 |
Jan. 31, 2017 |
Jul. 31, 2016 |
| Subsequent Event (Textual) |
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| Restricted cash |
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| Loan Agreement [Member] |
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| Subsequent Event (Textual) |
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| Payments of initial civil penalty |
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1,500
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| Payments of initial civil penalty |
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1,500
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| Restricted cash |
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$ 1,500
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| Subsequent Event [Member] |
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| Subsequent Event (Textual) |
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| Interest rate |
10.00%
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| Percentage of warrant description |
The Lenders will receive additional warrants on a monthly basis with an aggregate exercise price equal to 10% (dropping to 7.5% in September 2017) of the then outstanding Loan Amount.
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| Subsequent Event [Member] | Loan Agreement [Member] |
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| Subsequent Event (Textual) |
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| Borrowed from investors |
$ 17,500
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| Interest rate |
5.00%
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| Interest rate, Increase (Decrease) |
10.00%
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| Warrants expire date |
Dec. 29, 2017
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| Fair value of the warrants issued |
$ 4,040,000
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| Risk-free rate |
1.16%
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| Dividend yield |
0.00%
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| Volatility |
96.68%
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| Expected term |
1 year 11 months 1 day
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| Subsequent Event [Member] | Class B Common Stock [Member] |
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| Subsequent Event (Textual) |
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| Warrant issued to purchase common stock |
252,161
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| Warrants exercise price |
$ 34.70
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| Warrants expire date |
Dec. 31, 2018
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| Proceeds from aggregate warrants |
$ 7,500
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